There isn't anything built-in to either Evernote or Google Docs (now called "Google Drive") that will do a synchronization. Both services have an API so it would be possible for a third-party to build a synchronization tool.
One service which seems to do what you ask is cloudHQ. As of June 2012, this is a paid service which has a free option with limited ...

Yes, you can use IFTTT and create a recipe that goes from a "Feed" to Twitter.
Create a recipe:
Select the feed option:
Select the "new item in feed" option:
You can find your RSS feed for Stack Overflow by going to your profile page and scrolling down to the lower right corner.
It looks like you have to do this for each site, as I can't find a ...

Tweetdeck seems to serve some of your requirements:
TweetDeck is your personal real-time browser, connecting you with your contacts across Twitter, Facebook, MySpace, LinkedIn, Foursquare, Google Buzz and more.
However it makes no mention of xing.
As an afterthought, Power.com seems to meet, again, only some of your requirements (with the added ...

(If I remember right) you will be asked a question on what to do with the already existed bookmarks and one of the options is to merge them.
No matter what, Chrome is not going to delete anything valuable without your confirmation.

Windows Live Mesh does this, and it's free. I've used it for sync'ing large projects of source code between my office and home office, and it worked very nicely. It operates via the "cloud" (i.e. it gives you free online storage), and you can specify which devices you want to connect to that cloud repository.

After 8 months of research, I think I found the solution, which is multifaceted.
There are two issues (possibly more) that could be at play. Here is my final solution, which I posted here:
http://answers.microsoft.com/en-us/office/forum/office_2013_release-outlook/exchange-
ISSUE 1 - Possible Two Step verification problem and App passwords:
Sign in to ...

There is a "If This Then That" recipe you could utilize.
Notes: Uses http://iamnerdwin.com/work/runkeeper-activity-feed to
export data from RunKeeper and then http://www.feed43.com to turn the
data into RSS. See http://imgur.com/mwLasUY for key settings in
feed43.
It shouldn't require much tweaking at all. Just an IFTTT.com account (they're ...

OneDrive is based upon a Microsoft SharePoint backend (well, Onedrive for Business certainly is at least - we've just finished a pilot study to implement it for an entire University). I'm not entirely sure how the connection works but I believe it is WebDAV so the folder can be opened within Windows directly (in SharePoint web interface there is a button ...

From the information provided by you, seems to me that your contacts are local to the phone or part of a different service, not Google. When you synchronize with Google, only the Google data gets synced. Therefore, the other contacts, which are not part of Google contacts, will not be seen under your Google account. You'll have to migrate them, or copy them, ...

It seems to have done a minimal amount of syncing - i.e., it recognised that the files in the local folder were the same as those in the cloud, on Dropbox's servers. It only reported 10 files synced - rest all present. I think those 10 files were ones that had changed before I moved the folder back to be the local Dropbox folder - files that I had changed on ...

Found the solution after more searches ...
Use an Exchange account with this configuration :
Domain\User : Full email adress (e.g. : john.doe@outlook.com)
Server name : s.outlook.com
Other : Works with SSL on ports 443 and 993
Then, everything will be syncable

cloudHQ is a service set up to do exactly what you want.
What is cloudHQ?
cloudHQ is a service that continuously synchronizes and replicates data between multiple cloud services and cloud accounts in real-time.
For example, with cloudHQ you can sync Google Drive and Dropbox. So cloudHQ can copy all your files from Google Drive to ...

I had the same problem! i had to disconnect and re-sync and disconnect for it to finally get rid of them.
https://account.live.com/consent/manage
Manage accounts
Remove Connection Completely.
it should take a moment and then the contacts should disappear. if it doesn't work re-connect to gmail again and disconnect agian. otherwise i have no idea how i ...

You can setup a forward in your Yahoo email account. This way as soon as the email arrives in your Yahoo mailbox it will be immediately forwarded to Gmail.
Then, you can setup send email as under Gmail settings -> Accounts and Import so you can send all your emails from whichever account you want directly from Gmail.

I believe you could do this using Google Apps Script to update the Google Calendar when the change happens on the Google Site. This is probably more complex than what you were looking for but I don't believe there is any way to do this without writing a custom script.
Some information on the Calendar and Sites services API:
Calendar Services
Sites ...

I've built something that does almost exactly this.
my.syyn.cc
It's very alpha (eg: note the almost total lack of web design).
It can't work with a facebook fan page, but it can work with your wall. You authorise it to talk with your wordpress, and your facebook, and it'll sync posts in one or both directions (you just want wordpress->facebook, not the ...